Monogram GraphStudio is a nice tool for Graph files..(with open source)

changes in 0.3.2.0
-Render URL can accept more characters than the width of the input box is
-File name truncations fixed in &#8220;Text Information&#8221; form
-&#8220;Copy&#8221; button copies the text report into the clipboard
-Small &#8220;Text Information&#8221; form redesign
-&#8220;Delete Selection&#8221; added to filter context menu
-GraphStudio makes sure it is located on a visible portion of the screen at start

-InstalledCodec is a small utility displays the list of all Codec drivers and DirectShow filters currently installed on your system.For each component the following information is displayed: Display Name, Type, Disabled Status, Installed/Modified Time, Description, Company Name, Filename, and more... It allows you to easily disable or enable any Codec/DirectShow component or export the list into text/xml/html file.
-Read the readme.txt for the details